Self-Sourced Reservoir Fluid For Enhanced Oil Recovery

A method of enhanced oil recovery using self-sourced reservoir fluids, comprising:

• producing a hydrocarbon stream from a hydrocarbon reservoir;
• separating an associated gas stream from the hydrocarbon stream;
• refrigerating the associated gas stream to obtain a remaining gas stream and an enriched hydrocarbon fluid, wherein the remaining gas stream comprises primarily methane, and wherein the enriched hydrocarbon fluid stream comprises at least a minimum amount of C2+ to function as an effective miscible enhanced oil recovery fluid;
• and
• injecting at least a portion of the enriched hydrocarbon fluid stream into an oil layer of the hydrocarbon reservoir.

A system for obtaining an enhanced oil recovery fluid from a hydrocarbon reservoir, comprising:

• a wellhead operatively connected to the hydrocarbon reservoir and configured to receive a hydrocarbon stream from the hydrocarbon reservoir;
• and
• an enrichment component operatively coupled to the wellhead, wherein the enrichment component is configured to:
• receive the hydrocarbon stream;
• separate an associated gas stream from the hydrocarbon stream;
• and
• condense at least a portion of the associated gas stream to obtain an enriched hydrocarbon fluid.